Law, Felicia,
Simple machines : inventions that changed the world-- and the science behind them / written by Felicia Law & Gerry Bailey ; illustrated by Mike Phillips. - 32 pages : color illustrations ; 27 cm. - Stone age science .
Includes bibliographical references (page 32) and index.
Age 10-13. Grade 4 to 6.
9780778719175 (pbk. : alk. paper)
2015015358
Simple machines--Juvenile literature.
621.8 LAW
Simple machines : inventions that changed the world-- and the science behind them / written by Felicia Law & Gerry Bailey ; illustrated by Mike Phillips. - 32 pages : color illustrations ; 27 cm. - Stone age science .
Includes bibliographical references (page 32) and index.
Age 10-13. Grade 4 to 6.
9780778719175 (pbk. : alk. paper)
2015015358
Simple machines--Juvenile literature.
621.8 LAW